Compare ZEN 10 to ZEN 7

Hi all,

does anyone know if there is any documentation comparing ZEN 10 to ZEN 7? I
heard that ZEN 7 is more powerful than 10, but I cannot find any
documentation comparing the two. Basically, we have ZEN 7 and I want to see
if it is worth the time for us to "upgrade" to ZEN 10.

thanks in advance,
Frank